I just discovered that we can upload files to this wiki. The storage limit is 2 GB, which should be enough as long as we just put Powerpoints and stuff like that. Also the size limit is 10MB per file, so if you need to upload files that are slightly larger than 10MB, you can consider using a compression software like WinRAR(rarlabs) , and make each archive 9.5 MB, which means you should input 9961472 (in bytes) in for the option to split the files. I'm just gonna put the files page link here as well since I can't find a direct link to this. Here:
http://a2h0911mediaculturetopics.wikispaces.com/file/list?orderBy=date&orderDir=desc
I uploaded Xmind here as an example and at the same time sharing the software if any of you still want it but have trouble downloading it.